290420866

Then a large mass of mortar and rubble was placed on top of them. Large fiat stones were placed on the mortar and rubble mass, in a grid formation. By doing so, builders presumably expected to achieve various things. They had had (a) a high strength backfill, (b) a fairly rigid pile cap against lateral movements, (c) an impermeable pług behind the deformed section.

Of course, one of the merits of this design was that the vertical loads and possible moments were transferred to the rock foundation through the piles. This arrangement proved to be successful and no further repairs or reinforce-ments were reguired(Fig,2).

FIG. 1 - Original drawing of the 1796 drydock by Swedish engineer Rhode showing the drydock, dock entrance and two

possible extensions.    FIG. 2 - Present view of the once repaired corner.

859